Heat-insulating material.



hurrah" snares earner Km WESSEL, OF ST. PAUL, MINNESGTA.

' nueu-msunaume MATERIAL.

messes.

Ho Drawing.

To all whom it may concern: Be it known that I, KARL W'EssEL, a citizen of the United States, residing at St. Paul, in the count of Ramsey and State of Minnesota, have invented certain new and j useful Improvements in lleat lnsulating Material; and I do hereby declare the following to be a full, clear, and exact descrip-.

tion of theinvention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention has for its object to provide a highly eliicient and inexpensive heat in sulating. material WhlCll, when made insheets of proper thickness, is especially adaptedfer use in insulating walls of refrigerators, refrigerator cars, and dwellings.

This improved heat insulating material is made, preferably of about equal parts at flax, cereal straw and enough water to float t e same, put into a heater, such as used .inmaking pul thereby thorou hly commingled and eaten up and reduced approximately to what is known as half stock. The eat will be reduced more rapidly than t e flax and cereal straw and will actmore or less as and a binder to. the more fibrous particles of the flax and straw, while the fibers of the ax and straw, although short,-give strength to the material, or sheet formed therefrom. The peat can be advantageously introduced after the flax and straw have been well, beaten up and intereominingled. In fact,-

this late introduction of the peat is desirable to avoid reducing the peat to too fine consistency.

The commingled materials, while soaked .and containing a large amount of water,

will be suitably spread out, and the water pressed therefrom and the sheet dried. This ma; be done in diflerent ways,"but commercially, I propose to make this insulating material in a machine especially designed for a continuous and rapid formation of such insulating sheets and which machine is made geat, together with Specification of Letters Patent. Patented Feb. 25, 391 .5. Application aie sentcrnber a, 191?. Serial No. leases.

tion filed of date, Septeinher l, 1917. under "S. N. 189,493, and entitled Machine for making insulating sheets.

These insulating sheets, when dried. will have considerable flexibility and strength, and at the same time, will be light hr Weight. Moreover, such sheets, because of the very large number of minute air cells or air spaces therein, and because of the non-heat conducting quality of the substances, are very efficient 'as aheat insulator. All of the niat'erials employed in the formation of the sheet are of comparatively low cost. The

cereal straw, which is preferably either wheat straw, rye straw or barley strafsv, is

of much. lower cost than the fiat: and the peat is of still less cost than the cereal straw. A limited amount of flax, however,

is desirable, because it adds to the strength of the material. The total-cost of the several materials employed in the sheet is small, as comparedwitha similar material made entirely or nearly entirely from flax. and moreoverjhas at least as good heat insulating qualities as'theall-flax material.

What I claim is: 1. A heat insulating material made from flax, cereal straw and peat, intercommingled and pressed into the term of a selfsustaining bod I '2. A eat insulating sheet made from flax. cereal straw and pest. interconimingled and reduced aiiproximately to halt stock, and pressed, into a self-sustaining body.

till

3. A heat insulating sheet made from flax,

In testimony whereof I aflix mysignature in presence of two witnesses.

KARL llESSE L. 'Witnesses:

CLARA DsMAnEsT,

Bremen G. BAUMANN. 

